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author | David S. Miller <davem@davemloft.net> | 2015-09-26 23:08:27 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2015-09-26 23:08:27 (GMT) |
commit | 4963ed48f2c20196d51a447ee87dc2815584fee4 (patch) | |
tree | a1902f466dafa00453889a4f1e66b00249ce0529 /drivers/scsi/mpt2sas/mpt2sas_ctl.c | |
parent | 4d54d86546f62c7c4a0fe3b36a64c5e3b98ce1a9 (diff) | |
parent | 518a7cb6980cd640c7f979d29021ad870f60d7d7 (diff) | |
download | linux-4963ed48f2c20196d51a447ee87dc2815584fee4.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
net/ipv4/arp.c
The net/ipv4/arp.c conflict was one commit adding a new
local variable while another commit was deleting one.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/scsi/mpt2sas/mpt2sas_ctl.c')
-rw-r--r-- | drivers/scsi/mpt2sas/mpt2sas_ctl.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c index 4e50960..3694b63 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c +++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c @@ -427,13 +427,16 @@ static int _ctl_verify_adapter(int ioc_number, struct MPT2SAS_ADAPTER **iocpp) { struct MPT2SAS_ADAPTER *ioc; - + /* global ioc lock to protect controller on list operations */ + spin_lock(&gioc_lock); list_for_each_entry(ioc, &mpt2sas_ioc_list, list) { if (ioc->id != ioc_number) continue; + spin_unlock(&gioc_lock); *iocpp = ioc; return ioc_number; } + spin_unlock(&gioc_lock); *iocpp = NULL; return -1; } @@ -522,10 +525,15 @@ _ctl_poll(struct file *filep, poll_table *wait) poll_wait(filep, &ctl_poll_wait, wait); + /* global ioc lock to protect controller on list operations */ + spin_lock(&gioc_lock); list_for_each_entry(ioc, &mpt2sas_ioc_list, list) { - if (ioc->aen_event_read_flag) + if (ioc->aen_event_read_flag) { + spin_unlock(&gioc_lock); return POLLIN | POLLRDNORM; + } } + spin_unlock(&gioc_lock); return 0; } @@ -2168,16 +2176,23 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg, if (_ctl_verify_adapter(ioctl_header.ioc_number, &ioc) == -1 || !ioc) return -ENODEV; + /* pci_access_mutex lock acquired by ioctl path */ + mutex_lock(&ioc->pci_access_mutex); if (ioc->shost_recovery || ioc->pci_error_recovery || - ioc->is_driver_loading) - return -EAGAIN; + ioc->is_driver_loading || ioc->remove_host) { + ret = -EAGAIN; + goto out_unlock_pciaccess; + } state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING; if (state == NON_BLOCKING) { - if (!mutex_trylock(&ioc->ctl_cmds.mutex)) - return -EAGAIN; + if (!mutex_trylock(&ioc->ctl_cmds.mutex)) { + ret = -EAGAIN; + goto out_unlock_pciaccess; + } } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) { - return -ERESTARTSYS; + ret = -ERESTARTSYS; + goto out_unlock_pciaccess; } switch (cmd) { @@ -2258,6 +2273,8 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg, } mutex_unlock(&ioc->ctl_cmds.mutex); +out_unlock_pciaccess: + mutex_unlock(&ioc->pci_access_mutex); return ret; } @@ -2711,6 +2728,12 @@ _ctl_BRM_status_show(struct device *cdev, struct device_attribute *attr, "warpdrive\n", ioc->name, __func__); goto out; } + /* pci_access_mutex lock acquired by sysfs show path */ + mutex_lock(&ioc->pci_access_mutex); + if (ioc->pci_error_recovery || ioc->remove_host) { + mutex_unlock(&ioc->pci_access_mutex); + return 0; + } /* allocate upto GPIOVal 36 entries */ sz = offsetof(Mpi2IOUnitPage3_t, GPIOVal) + (sizeof(u16) * 36); @@ -2749,6 +2772,7 @@ _ctl_BRM_status_show(struct device *cdev, struct device_attribute *attr, out: kfree(io_unit_pg3); + mutex_unlock(&ioc->pci_access_mutex); return rc; } static DEVICE_ATTR(BRM_status, S_IRUGO, _ctl_BRM_status_show, NULL); |